Dear Sarah;-
    Good answer. In suport of the answer, I offer my observations of
my fishbowl. I feed the critters every day. They all come up when I
turn the light on----all except my two inch, blind catfish. He has
lived for 12 years on whatever floats down his way. He doesn't hurry,
just flits away on whatever is there, like a lady at a K-Mart sale.
His name is Jeffrey--but in 12 years, he hasn't learned to respond
when I call him.
             Art